Cloudera HBase Certification Questions and Answers (Dumps and Practice Questions)

Question :HBase tables are considered as a distributed sorted map, in this case which is the key part



1. Row Key
2. Column Key
3. Timestamp
4. All 1,2 and 3 are correct
5. None of the above is correct



Correct Answer : 4

An HBase table is a distributed sorted map
(Row key + column key + timestamp) ::: value






Question :

In a column families all the column members ..

1. Have same prefix
2. "collon" is delimits the CF from the qualifier
3. Columns can be created on the fly
4. All of the above





Correct Answer : 4


Explanation: Columns are grouped into Column Families
All column members have the same prefix
E.g. metadata:fname and metadata:lname
The collon(:) delimits the CF from the qualifier
Columns can be created on the fly
Physically, all column family members are stored together
Column families must be declared at schema definition time
Tuning and storage specifications are on Column Families





Question : Tuning and storage specification must be declared on column family level


1. True
2. False


Correct Answer : 1

Columns are grouped into Column Families
All column members have the same prefix
E.g., metadata:fname and metadata:lname
The collon(:) delimits the CF from the qualifier
Columns can be created on the fly
Physically, all column family members are stored together
Column families must be declared at schema definition time
Tuning and storage specifications are on Column Families

Related Questions

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Question : In HBase to lookup of a row by a single key?

1. True
2. False




Question : Hbase supports the transaction for single row ?

1. True
2. False




Question : Which are the supported method to access the data from HBase


1. get
2. put
3. scan
4. 1,2 and 3 are correct
5. It has to be accessed by Query only


Question : Rows from the HBase can directly be inserted as input to Mapreduce job


1. True
2. False



Question : In which of the following scenerio we should use HBase

1. If it require random read, write or both
2. If it requires to do many thousands of operations per second on multiple TB of data
3. If access pattern is well known and simple
4. All of the above




Question : In which scenerio HBase should not be used


1. You only append to your dataset, and tend to read the whole thing
2. For ad-hoc analytics
3. If data volume is quite small
4. All of the above
5. None of the above